Detachable jack base



Nov. 10, 1936. T, C, WH|TE DETACHABLE JACK BASE Filed Aug. '7, 1934 Patented Nov. 10, 1936 UNITED STATES PATENT OFFICE 4 Claims.

This invention relates to a detachable base or platform for vehicle-lifting jacks. The principal object of the invention is to provide a quickly detachable auxiliary base for vehicle jacks particularly useful for supporting the jack in soft, muddy, or sandy soil.

Another object of the invention is to construct a detachable base in such a manner that it will rmly hold any size regular jack and yet permit its ready removal from the base.

A still further object is to form the detachable base with its holding mechanism in a very compact form, so that it may be easily stowed away and carried in the Vehicle.

In the drawing, Fig. 1 is a top plan View of the base and the jack-holding means.

Fig. 2 is a cross-section taken on line 2--2 of Fig. 1.

Fig. 3 is a cross-section taken on line 3 3 of Fig. 1.

Fig. 4 illustrates a conventional jack in operative position on the detachable base.

The ground-engaging plate or platform I is composed of a sheet of fairly thick gauged metal having its marginal edges 2 rounded and turned upwardly. It is preferable to use a rectangular metal plate, which may be of any desired size, although a plate l" x 12" has been found practical for supporting jacks of pleasure cars. On the mid-line through the length of the plate, and adjacent the ends thereof, are struck-up portions 3 and 3 whose utility will be hereinafter described. On the mid-line through the width of the plate, and somewhat inwardly from the edges of the plate, are struck-up lugs 4 and 5.

Running lengthwise of the plate I on either side of the struck-up portions 3 and 3, and also spaced from the center of the plate, are pairs of parallel slots or openings 6 and 'I. Positioned on the face of the plate and riding in each pair of parallel slots 6 and 'l are substantially Z shaped members I0 and II. The outer ends of the bottom flat section of each Z-shaped member is turned or bent into a pair of the parallel slots S or 1, with the outer ends 8 and 9 bent outwardly, thus securing the Z-shaped members in contact with the plate I which permits each member I0 and II to slide or move freely in its pair of parallel slots.

The upper flat section of each Z-shaped member also lies parallel to the face of the plate I; the distance between the upper and lower sections of the Z being sufficient to accommodate the base member of a conventional Vehicle jack.

Rods I4 and vISS are affixed to the rear of the Z sections I0 and Il, the outer ends of the rods passing through openings formed in the struckup portions 3 and 3.

Coil springs I6 encircle the rods I4 and I5 and abut the Z sections and the struck-up portions 3 5 and 3'. Consequently, at all times, the Z sections are urged towards the inner ends of the slots 6 and 'I which terminate adjacent the center of the plate.

The ends of the Z-shaped sections Ill and II 10 are flared outwardly at I2 and I3 to provide cam surfaces against which the edges of the jack base to be supported are contacted to insure ease of applying the jack to the base.

As illustrated in the drawing, the upper flat portions of the Z sections may be cut away at their flared ends to further facilitate attaching the jack to the base.

Fig. 4 shows a conventional lifting jack A supported under the upper edges of the Z-shaped sections I and I I. In applying the jack A to the detachable base the base of the jack is contacted with the rounded or cammed surfaces I2 and I3 and overcomes the tension of the coil springs I6 which permits the Z sections to move out- 25 wardly; thus allowing the jack base to be held under the sections I and II. The lugs 4 and 5, as shown in Fig. 3, prevent the jack from becoming displaced on the base plate I.

A detachable jack base constructed according to the present invention will accommodate practically any size jack base, as the length of the slots 6 is such that they will permit movement of sections Il) and II. It will be noted that the edges of the plates registering with the rods I4 35 and I5 are cut away so that the rods may pass outwardly beyond the 11p-turned edges 2 when a wide jack base is being supported. It will also be appreciated that the upturning of the edge 2 of the plate facilitates placing the jack under the Vehicle, as the curved edge acts as a skid and prevents binding of the base as it is slid on the ground under the vehicle axle.

What I claim is:

1. A detachable jack base including a rectangular plate having bent-up edges, a pair of parallel spaced spring-pressed upstanding flange members having depending integral lugs slotted into openings formed in said plate and adapted to detachably support a vehicle jack therebetween.

2. An auxiliary base for lifting jacks comprising a substantially large area ground-engaging plate having upturned beveled edges, resilient jack-holding means on said plate including parallel spaced inturned ange members adapted to engage the base of a lifting jack and spaced apart jack base centering stops pressed upwardly from the surface of the said plate at central points thereon and just beyond the ends of the said ange members.

3. An auxiliary base for vehicle jacks comprising a fiat ground-engaging plate, spaced parallel and movable upstanding inturned flange members slotted into said plate, upstanding lugs formed in said plate in spaced relation to said flange members, and a resilient connection between said ange members and said upstanding lugs.

4. An auxiliary base for Vehicle jacks including a ground-engaging plate having an upturned edge, Z-shaped spaced flange members slotted into said plate, perforated lugs pressed up from said plate behind and in spaced relation to said Z-shaped flange members, rods axed to the rear of said ange members and carried in said perforated lugs and coiled tension springs encircling 10 said rods.

TOM C. WHITE. 

